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sitized paper is treated.

the action of light.

' UNITED STATES PATENT Gimme.

JUAN DE M. TERREFORTE, OF NEWYORK, N. Y., ASSIGNOR TO HIMSELF ANDANTONIOM. MOLINA, OF SAME PLACE. I

ART OF PRINTING AND MOUNTING PHOTOGRAPHIC PICTURES.

' SPECIFICATION forming pay: of Letters Patent No. 295,688, dated March25, 1884.

' Application filed June 27, 1883. (No specimens.)

To all whom it may concern..-

Be it known that I, JUAN DE M. TERRE- FORTE, of the city, county, andState of New York, have invented certain new anduseful Improvements inthe Art of Printing and Mounting Photographic Pictures, of which thefollowing is a full, clear, and exact description. r I

In carrying my invention into practice, I provide a solution, which Icall solution No. 1, composed of refined gelatine, fifteen parts;distilled water, one hundred parts; chloride of ammonium, one part. Theabove are to be mixed under a gentle heat and filtered through muslin. Ialso prepare a solution, No. 2, composed of refined gelatine, ten parts;distilled water, eighty parts. The above are to be mixed under a gentleheat, and to the mixture I then add a solution of nitrate of silver,

made by dissolving four parts of crystallized nitrate of silver in tenparts of distilled water. The two solutions or mixtures Nos. 1 and 2 arethen mixed "together, and I thus produce a sensitive emulsion ofchloride of silver ready for use, which is to be carefullypreserved fromaccess of light.

Upon a well'cle'aned glass plate I form a film of plain collodion, whichis allowed to dry, andupon the collodion filmI then pour aquantity ofsaid sensitive emulsion, sufficient evenly to coat the collodion film. Ithen allow the plate to dry. In this manner I produce a sen sitive plateready for the usual photographicprinting process. If it is desired toincrease the sensibility of the plate, I now submit the sensitivecoating to the fumes of ammonia in the same way that ordinaryphotographic sen- I print the picture in the ordinary manner, by placinga negative in contact with the sensitive surface of my preparedplate,,and subject the same to I then develop, tone, fix, and wash thepicture in substantially the same manner that ordinary photographicpictures are'treated, using chloride of gold for toning and hyposulphiteof soda for the fixing, and then wash the picture in water for half anhour, more or less.

When the picture is dry, it presents the beautiful appearance of afinished transparency on glass, and in this condition it may, ifdesired, be colored by the knife under the edges of the paper and stripthe paper, and with it the attached picture and collodion, from theglass. I The picture thus produced and mounted on the paper presents abeautiful appearance, having a smooth and glossy face, caused by thecollodion film. The picture may then be trimmed and further mounted uponsuitable stiff card-board. If

desired, the picture may be made to resemble those taken upon porcelainplates. This I effect by mounting my picture in the first instance uponpolished hard white cartridgepaper.

Pictures made in accordance with my invention are more durable and havea finer appearance than the ordinary pictures that are printed on paper,which latter, owing to the action of the air, light, andchemicals uponthe fiber of the paper, are apt to turn yellow and lose their beauty ina short time.

Among the advantages of my improvement are the following: The picture isprinted and finished upon a pcllicle or non-fibrous body; hence thefinest details of light and shadow in the negative are reproduced in theprint with fidelity and brilliancy. Any desired special tint or colormay be given to the whole pic ture by dipping the same in a suitabletinting solution prior to mounting it upon paper; or, if desired, atinted paper may be used on which to mount the picture, which will, insome cases, give a pleasing appearance to the picture. Another importantadvantage of my improvement is a saving of nitrate of silver. For myprocess I only require five per cent. of silver in thesensitizing-mixture, whereas the ordinary photographic-printing process,

in which albumen paper is used, requires fifteen per cent. of silver inthe sensitizing-bath. Thus I am enabled by my process to produce thefinest quality of pictures, while using only one-third of the quantityof the silver ordina rily consumed in making paper prints.

I do not abandon or dedicate to the public any patentable feature setforth herein and not hereinafter claimed, but reserve the right to claimthe same, either in a reissue of any patent that may be granted uponthis application or in other applications for Letters Patent that I maymake.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

The method herein described of taking and mounting photographicpictures, Which consists in preparing upon glass or other suitablesurface a film of dry collodion, then spreading upon the collodion filma sensitive coating of gelatinous or albuminous emulsion con- JUAN DE M.TERR-EFORTE.

WVitnesses:

EDGAR TATE, ALFRED H. DAVIS.

